@article{ZNSL_2004_309_a1,
     author = {A. George and Kh. D. Ikramov},
     title = {A~note on the canonical form for a~pair of orthoprojectors},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {17--22},
     publisher = {mathdoc},
     volume = {309},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2004_309_a1/}
}